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49 * Functions for SPI initialization, configuration,
52 * <hr>$Revision: 70030 $<hr>
54 #ifndef __CVMX_HELPER_SPI_H__
55 #define __CVMX_HELPER_SPI_H__
59 * Probe a SPI interface and determine the number of ports
60 * connected to it. The SPI interface should still be down after
63 * @param interface Interface to probe
65 * @return Number of ports on the interface. Zero to disable.
67 extern int __cvmx_helper_spi_probe(int interface);
68 extern int __cvmx_helper_spi_enumerate(int interface);
72 * Bringup and enable a SPI interface. After this call packet I/O
73 * should be fully functional. This is called with IPD enabled but
76 * @param interface Interface to bring up
78 * @return Zero on success, negative on failure
80 extern int __cvmx_helper_spi_enable(int interface);
84 * Return the link state of an IPD/PKO port as returned by
85 * auto negotiation. The result of this function may not match
86 * Octeon's link config if auto negotiation has changed since
87 * the last call to cvmx_helper_link_set().
89 * @param ipd_port IPD/PKO port to query
93 extern cvmx_helper_link_info_t __cvmx_helper_spi_link_get(int ipd_port);
97 * Configure an IPD/PKO port for the specified link state. This
98 * function does not influence auto negotiation at the PHY level.
99 * The passed link state must always match the link state returned
100 * by cvmx_helper_link_get(). It is normally best to use
101 * cvmx_helper_link_autoconf() instead.
103 * @param ipd_port IPD/PKO port to configure
104 * @param link_info The new link state
106 * @return Zero on success, negative on failure
108 extern int __cvmx_helper_spi_link_set(int ipd_port, cvmx_helper_link_info_t link_info);